Proform 850 dialing it in closer

I paired up my 2 barrel run, up with all my 4 barrel runs............Most 2nt and 3d gear run, the 2 barrel o2 was just slightly leaner all the way thru.
however there was a couple that mix above and below the line of the 2 barrel graph.
so that was my gut feeling was to drop one jet size up front and 2 in the back.

when and look up what the jetting came standard on this carb and it was 76 up front and 84 in the back (76/84).
I'm at 70/80 before i took all of this Data...haven't changed them yet.

mderoy340 said

I always get the main jetting mph correct first and then tune pump cam and nozzles to best 60' times. A good starting point for accelerator pump nozzles for you would be 33 front and rear, orange #2 front/orange #1 rear. If you are launching at 2K rpm for example, use #2 hole up front so you save more pump shot for WOT at launch. With so many different combos it is a long process to get the best setup and I rely on 60' instead butt dyno.

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Sqirters, 33/33 both, cams are red and in the first hole or position.